Lactose Intolerant and Watching Your Blood Sugar
Which milk alternatives are actually low glycemic, why most of them are lower in protein than dairy, and what to use instead.
"Do you have a pre-diabetic plan for lactose intolerance?"
Yes, and the substitutions are straightforward — but there's a protein trap worth knowing about.
Which alternatives behave best
Unsweetened soy milk is the only common plant milk with protein comparable to dairy, at roughly 7–8g per cup. If you're replacing milk and you care about protein, this is the one.
Unsweetened almond, macadamia and coconut milk are very low in carbohydrate and very low in protein — usually 1g or less per cup. Fine as a liquid, useless as a protein source.
Oat milk is the one to watch. The enzymatic process that makes it creamy breaks starch into sugars, and it's meaningfully higher in carbohydrate than the others. Not forbidden, but not the default choice for someone managing blood sugar.
Rice milk is the highest of the common options and worth skipping.
The word to look for on every one of these is unsweetened. The sweetened versions are a different product entirely.
The protein trap
Here's the part people miss. Swapping dairy for almond milk removes protein you were probably counting on — especially at breakfast, where the target is 25 to 30 grams and most people are already short.
If you make that swap, the protein has to come from somewhere else: eggs, a protein powder, tofu, or unsweetened soy milk rather than nut milk.
Lactose-free dairy is still dairy
Worth saying plainly, because it often gets overlooked. Lactose-free milk, hard cheeses (naturally very low in lactose), and Greek yogurt strained of much of its lactose are all options if your intolerance is partial rather than absolute.
Greek yogurt in particular is worth testing — many people who react to milk tolerate it.
The good news about legumes
If you're avoiding dairy, lentils, chickpeas and beans do double duty: low glycemic and a real protein contribution. They become more important in a dairy-free version of this way of eating.
Try this week: check whether your plant milk says unsweetened, and check its protein per cup. Most people are surprised.
Education, not medical advice.
Sources
- Atkinson FS, et al. International tables of glycemic index and glycemic load values 2021. *Am J Clin Nutr* 2021;114(5):1625–1632 View source
- Bauer J, et al. Evidence-based recommendations for optimal dietary protein intake in older people: PROT-AGE position paper. *JAMDA* 2013 View source